The invention discloses a self-cooling police uniform comprising a police uniform body; the shoulders of the police uniform body are sewed with two mount boxes arranged in symmetry; the mount box is ahollow rectangular structure, and has a top opening; a movable block is arranged in the mount box; two sides of the movable block are symmetrically provided with movable rods; movable slots are symmetrically arranged in the length direction along two side walls, close to the movable rods, of the mount box, and connected with the movable rods in a slide mode; one side of the movable block is connected with two connecting plates arranged in symmetry; one side, far away from the movable block, of the connecting plate is connected with a mount plate that has a second heat radiation fan; backing sides of the two connecting plates are respectively connected with a sleeve. The self-cooling police uniform is novel in structure, can automatically realize heat radiation, can be promoted, and can provide excellent work conditions for the police force.